I was a muslim, around in the AD 800's and in the Abbsidd calphate
I was a mathematician, astronomer, and geographer.
One contributation that I think was important to society to day was
Ok, I know what your thinking, how can making a simple word make you think its one of my greatest contributions. I think that it is quite amazing that I made this word 500 years ago and you still use that word today, whether it's while we're speaking or we are using the concept in math class.
And another contribution that i did was I created the work algorithm. Which means rules that need to be followed while solving an equation.